Hercynia

Hercynia was a region of Central Europe during the era of the Roman Empire. The Harz Mountains of eastern Germany derive their name from Hercynia, a forested and mountainous region which was known for its gigantic oaks and its ravines. A part of ethnographic Germania, the region was once inhabited by the Boii, who lend their name to the region's current name, Bohemia. In 270 AD, the Buri of present-day Poland conquered the Boii town of Istros (named for the Danube River) and invaded Roman Pannonia from Hercynia, leading to a Roman punitive expedition capturing Istros and driving the Buri back into the lands of the Lugii.